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freebsd-skq/sys/dev/pci/pci_user.c
kib af9bfba938 Require write access when mmapping BAR. 
This actually makes the rights requirements for accessing PCI config
space and BARs using /dev/pci same.  Since unchanged /dev/pci mode
only allows write open for root, default configuration de-facto limits
the BAR read to root only.  In particular, state-changing reads of the
registers are limited to root.

Discussed with:	se
Suggested and reviewed by:	jhb (kernel part)
Sponsored by:	The FreeBSD Foundation
MFC after:	12 days
Differential revision:	https://reviews.freebsd.org/D16580
2018-08-03 18:35:20 +00:00

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30 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_bus.h" /* XXX trim includes */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/linker.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/mman.h>
#include <sys/proc.h>
#include <sys/queue.h>
#include <sys/rwlock.h>
#include <sys/sglist.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <sys/pciio.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include "pcib_if.h"
#include "pci_if.h"
/*
* This is the user interface to PCI configuration space.
*/
static d_open_t pci_open;
static d_close_t pci_close;
static d_ioctl_t pci_ioctl;
struct cdevsw pcicdev = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = pci_open,
.d_close = pci_close,
.d_ioctl = pci_ioctl,
.d_name = "pci",
};
static int
pci_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
int error;
if (oflags & FWRITE) {
error = securelevel_gt(td->td_ucred, 0);
if (error)
return (error);
}
return (0);
}
static int
pci_close(struct cdev *dev, int flag, int devtype, struct thread *td)
{
return 0;
}
/*
* Match a single pci_conf structure against an array of pci_match_conf
* structures. The first argument, 'matches', is an array of num_matches
* pci_match_conf structures. match_buf is a pointer to the pci_conf
* structure that will be compared to every entry in the matches array.
* This function returns 1 on failure, 0 on success.
*/
static int
pci_conf_match_native(struct pci_match_conf *matches, int num_matches,
struct pci_conf *match_buf)
{
int i;
if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0))
return(1);
for (i = 0; i < num_matches; i++) {
/*
* I'm not sure why someone would do this...but...
*/
if (matches[i].flags == PCI_GETCONF_NO_MATCH)
continue;
/*
* Look at each of the match flags. If it's set, do the
* comparison. If the comparison fails, we don't have a
* match, go on to the next item if there is one.
*/
if (((matches[i].flags & PCI_GETCONF_MATCH_DOMAIN) != 0)
&& (match_buf->pc_sel.pc_domain !=
matches[i].pc_sel.pc_domain))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_BUS) != 0)
&& (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEV) != 0)
&& (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC) != 0)
&& (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR) != 0)
&& (match_buf->pc_vendor != matches[i].pc_vendor))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE) != 0)
&& (match_buf->pc_device != matches[i].pc_device))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS) != 0)
&& (match_buf->pc_class != matches[i].pc_class))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT) != 0)
&& (match_buf->pd_unit != matches[i].pd_unit))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_NAME) != 0)
&& (strncmp(matches[i].pd_name, match_buf->pd_name,
sizeof(match_buf->pd_name)) != 0))
continue;
return(0);
}
return(1);
}
#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD6)
#define PRE7_COMPAT
typedef enum {
PCI_GETCONF_NO_MATCH_OLD = 0x00,
PCI_GETCONF_MATCH_BUS_OLD = 0x01,
PCI_GETCONF_MATCH_DEV_OLD = 0x02,
PCI_GETCONF_MATCH_FUNC_OLD = 0x04,
PCI_GETCONF_MATCH_NAME_OLD = 0x08,
PCI_GETCONF_MATCH_UNIT_OLD = 0x10,
PCI_GETCONF_MATCH_VENDOR_OLD = 0x20,
PCI_GETCONF_MATCH_DEVICE_OLD = 0x40,
PCI_GETCONF_MATCH_CLASS_OLD = 0x80
} pci_getconf_flags_old;
struct pcisel_old {
u_int8_t pc_bus; /* bus number */
u_int8_t pc_dev; /* device on this bus */
u_int8_t pc_func; /* function on this device */
};
struct pci_conf_old {
struct pcisel_old pc_sel; /* bus+slot+function */
u_int8_t pc_hdr; /* PCI header type */
u_int16_t pc_subvendor; /* card vendor ID */
u_int16_t pc_subdevice; /* card device ID, assigned by
card vendor */
u_int16_t pc_vendor; /* chip vendor ID */
u_int16_t pc_device; /* chip device ID, assigned by
chip vendor */
u_int8_t pc_class; /* chip PCI class */
u_int8_t pc_subclass; /* chip PCI subclass */
u_int8_t pc_progif; /* chip PCI programming interface */
u_int8_t pc_revid; /* chip revision ID */
char pd_name[PCI_MAXNAMELEN + 1]; /* device name */
u_long pd_unit; /* device unit number */
};
struct pci_match_conf_old {
struct pcisel_old pc_sel; /* bus+slot+function */
char pd_name[PCI_MAXNAMELEN + 1]; /* device name */
u_long pd_unit; /* Unit number */
u_int16_t pc_vendor; /* PCI Vendor ID */
u_int16_t pc_device; /* PCI Device ID */
u_int8_t pc_class; /* PCI class */
pci_getconf_flags_old flags; /* Matching expression */
};
struct pci_io_old {
struct pcisel_old pi_sel; /* device to operate on */
int pi_reg; /* configuration register to examine */
int pi_width; /* width (in bytes) of read or write */
u_int32_t pi_data; /* data to write or result of read */
};
#ifdef COMPAT_FREEBSD32
struct pci_conf_old32 {
struct pcisel_old pc_sel; /* bus+slot+function */
uint8_t pc_hdr; /* PCI header type */
uint16_t pc_subvendor; /* card vendor ID */
uint16_t pc_subdevice; /* card device ID, assigned by
card vendor */
uint16_t pc_vendor; /* chip vendor ID */
uint16_t pc_device; /* chip device ID, assigned by
chip vendor */
uint8_t pc_class; /* chip PCI class */
uint8_t pc_subclass; /* chip PCI subclass */
uint8_t pc_progif; /* chip PCI programming interface */
uint8_t pc_revid; /* chip revision ID */
char pd_name[PCI_MAXNAMELEN + 1]; /* device name */
uint32_t pd_unit; /* device unit number (u_long) */
};
struct pci_match_conf_old32 {
struct pcisel_old pc_sel; /* bus+slot+function */
char pd_name[PCI_MAXNAMELEN + 1]; /* device name */
uint32_t pd_unit; /* Unit number (u_long) */
uint16_t pc_vendor; /* PCI Vendor ID */
uint16_t pc_device; /* PCI Device ID */
uint8_t pc_class; /* PCI class */
pci_getconf_flags_old flags; /* Matching expression */
};
struct pci_conf_io32 {
uint32_t pat_buf_len; /* pattern buffer length */
uint32_t num_patterns; /* number of patterns */
uint32_t patterns; /* pattern buffer
(struct pci_match_conf_old32 *) */
uint32_t match_buf_len; /* match buffer length */
uint32_t num_matches; /* number of matches returned */
uint32_t matches; /* match buffer
(struct pci_conf_old32 *) */
uint32_t offset; /* offset into device list */
uint32_t generation; /* device list generation */
pci_getconf_status status; /* request status */
};
#define PCIOCGETCONF_OLD32 _IOWR('p', 1, struct pci_conf_io32)
#endif /* COMPAT_FREEBSD32 */
#define PCIOCGETCONF_OLD _IOWR('p', 1, struct pci_conf_io)
#define PCIOCREAD_OLD _IOWR('p', 2, struct pci_io_old)
#define PCIOCWRITE_OLD _IOWR('p', 3, struct pci_io_old)
static int
pci_conf_match_old(struct pci_match_conf_old *matches, int num_matches,
struct pci_conf *match_buf)
{
int i;
if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0))
return(1);
for (i = 0; i < num_matches; i++) {
if (match_buf->pc_sel.pc_domain != 0)
continue;
/*
* I'm not sure why someone would do this...but...
*/
if (matches[i].flags == PCI_GETCONF_NO_MATCH_OLD)
continue;
/*
* Look at each of the match flags. If it's set, do the
* comparison. If the comparison fails, we don't have a
* match, go on to the next item if there is one.
*/
if (((matches[i].flags & PCI_GETCONF_MATCH_BUS_OLD) != 0)
&& (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEV_OLD) != 0)
&& (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC_OLD) != 0)
&& (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR_OLD) != 0)
&& (match_buf->pc_vendor != matches[i].pc_vendor))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE_OLD) != 0)
&& (match_buf->pc_device != matches[i].pc_device))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS_OLD) != 0)
&& (match_buf->pc_class != matches[i].pc_class))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT_OLD) != 0)
&& (match_buf->pd_unit != matches[i].pd_unit))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_NAME_OLD) != 0)
&& (strncmp(matches[i].pd_name, match_buf->pd_name,
sizeof(match_buf->pd_name)) != 0))
continue;
return(0);
}
return(1);
}
#ifdef COMPAT_FREEBSD32
static int
pci_conf_match_old32(struct pci_match_conf_old32 *matches, int num_matches,
struct pci_conf *match_buf)
{
int i;
if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0))
return(1);
for (i = 0; i < num_matches; i++) {
if (match_buf->pc_sel.pc_domain != 0)
continue;
/*
* I'm not sure why someone would do this...but...
*/
if (matches[i].flags == PCI_GETCONF_NO_MATCH_OLD)
continue;
/*
* Look at each of the match flags. If it's set, do the
* comparison. If the comparison fails, we don't have a
* match, go on to the next item if there is one.
*/
if (((matches[i].flags & PCI_GETCONF_MATCH_BUS_OLD) != 0) &&
(match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEV_OLD) != 0) &&
(match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC_OLD) != 0) &&
(match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR_OLD) != 0) &&
(match_buf->pc_vendor != matches[i].pc_vendor))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE_OLD) != 0) &&
(match_buf->pc_device != matches[i].pc_device))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS_OLD) != 0) &&
(match_buf->pc_class != matches[i].pc_class))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT_OLD) != 0) &&
((u_int32_t)match_buf->pd_unit != matches[i].pd_unit))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_NAME_OLD) != 0) &&
(strncmp(matches[i].pd_name, match_buf->pd_name,
sizeof(match_buf->pd_name)) != 0))
continue;
return (0);
}
return (1);
}
#endif /* COMPAT_FREEBSD32 */
#endif /* !PRE7_COMPAT */
union pci_conf_union {
struct pci_conf pc;
#ifdef PRE7_COMPAT
struct pci_conf_old pco;
#ifdef COMPAT_FREEBSD32
struct pci_conf_old32 pco32;
#endif
#endif
};
static int
pci_conf_match(u_long cmd, struct pci_match_conf *matches, int num_matches,
struct pci_conf *match_buf)
{
switch (cmd) {
case PCIOCGETCONF:
return (pci_conf_match_native(
(struct pci_match_conf *)matches, num_matches, match_buf));
#ifdef PRE7_COMPAT
case PCIOCGETCONF_OLD:
return (pci_conf_match_old(
(struct pci_match_conf_old *)matches, num_matches,
match_buf));
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
return (pci_conf_match_old32(
(struct pci_match_conf_old32 *)matches, num_matches,
match_buf));
#endif
#endif
default:
/* programmer error */
return (0);
}
}
static int
pci_list_vpd(device_t dev, struct pci_list_vpd_io *lvio)
{
struct pci_vpd_element vpd_element, *vpd_user;
struct pcicfg_vpd *vpd;
size_t len;
int error, i;
vpd = pci_fetch_vpd_list(dev);
if (vpd->vpd_reg == 0 || vpd->vpd_ident == NULL)
return (ENXIO);
/*
* Calculate the amount of space needed in the data buffer. An
* identifier element is always present followed by the read-only
* and read-write keywords.
*/
len = sizeof(struct pci_vpd_element) + strlen(vpd->vpd_ident);
for (i = 0; i < vpd->vpd_rocnt; i++)
len += sizeof(struct pci_vpd_element) + vpd->vpd_ros[i].len;
for (i = 0; i < vpd->vpd_wcnt; i++)
len += sizeof(struct pci_vpd_element) + vpd->vpd_w[i].len;
if (lvio->plvi_len == 0) {
lvio->plvi_len = len;
return (0);
}
if (lvio->plvi_len < len) {
lvio->plvi_len = len;
return (ENOMEM);
}
/*
* Copyout the identifier string followed by each keyword and
* value.
*/
vpd_user = lvio->plvi_data;
vpd_element.pve_keyword[0] = '\0';
vpd_element.pve_keyword[1] = '\0';
vpd_element.pve_flags = PVE_FLAG_IDENT;
vpd_element.pve_datalen = strlen(vpd->vpd_ident);
error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
if (error)
return (error);
error = copyout(vpd->vpd_ident, vpd_user->pve_data,
strlen(vpd->vpd_ident));
if (error)
return (error);
vpd_user = PVE_NEXT(vpd_user);
vpd_element.pve_flags = 0;
for (i = 0; i < vpd->vpd_rocnt; i++) {
vpd_element.pve_keyword[0] = vpd->vpd_ros[i].keyword[0];
vpd_element.pve_keyword[1] = vpd->vpd_ros[i].keyword[1];
vpd_element.pve_datalen = vpd->vpd_ros[i].len;
error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
if (error)
return (error);
error = copyout(vpd->vpd_ros[i].value, vpd_user->pve_data,
vpd->vpd_ros[i].len);
if (error)
return (error);
vpd_user = PVE_NEXT(vpd_user);
}
vpd_element.pve_flags = PVE_FLAG_RW;
for (i = 0; i < vpd->vpd_wcnt; i++) {
vpd_element.pve_keyword[0] = vpd->vpd_w[i].keyword[0];
vpd_element.pve_keyword[1] = vpd->vpd_w[i].keyword[1];
vpd_element.pve_datalen = vpd->vpd_w[i].len;
error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
if (error)
return (error);
error = copyout(vpd->vpd_w[i].value, vpd_user->pve_data,
vpd->vpd_w[i].len);
if (error)
return (error);
vpd_user = PVE_NEXT(vpd_user);
}
KASSERT((char *)vpd_user - (char *)lvio->plvi_data == len,
("length mismatch"));
lvio->plvi_len = len;
return (0);
}
static size_t
pci_match_conf_size(u_long cmd)
{
switch (cmd) {
case PCIOCGETCONF:
return (sizeof(struct pci_match_conf));
#ifdef PRE7_COMPAT
case PCIOCGETCONF_OLD:
return (sizeof(struct pci_match_conf_old));
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
return (sizeof(struct pci_match_conf_old32));
#endif
#endif
default:
/* programmer error */
return (0);
}
}
static size_t
pci_conf_size(u_long cmd)
{
switch (cmd) {
case PCIOCGETCONF:
return (sizeof(struct pci_conf));
#ifdef PRE7_COMPAT
case PCIOCGETCONF_OLD:
return (sizeof(struct pci_conf_old));
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
return (sizeof(struct pci_conf_old32));
#endif
#endif
default:
/* programmer error */
return (0);
}
}
static void
pci_conf_io_init(struct pci_conf_io *cio, caddr_t data, u_long cmd)
{
#if defined(PRE7_COMPAT) && defined(COMPAT_FREEBSD32)
struct pci_conf_io32 *cio32;
#endif
switch (cmd) {
case PCIOCGETCONF:
#ifdef PRE7_COMPAT
case PCIOCGETCONF_OLD:
#endif
*cio = *(struct pci_conf_io *)data;
return;
#if defined(PRE7_COMPAT) && defined(COMPAT_FREEBSD32)
case PCIOCGETCONF_OLD32:
cio32 = (struct pci_conf_io32 *)data;
cio->pat_buf_len = cio32->pat_buf_len;
cio->num_patterns = cio32->num_patterns;
cio->patterns = (void *)(uintptr_t)cio32->patterns;
cio->match_buf_len = cio32->match_buf_len;
cio->num_matches = cio32->num_matches;
cio->matches = (void *)(uintptr_t)cio32->matches;
cio->offset = cio32->offset;
cio->generation = cio32->generation;
cio->status = cio32->status;
return;
#endif
default:
/* programmer error */
return;
}
}
static void
pci_conf_io_update_data(const struct pci_conf_io *cio, caddr_t data,
u_long cmd)
{
struct pci_conf_io *d_cio;
#if defined(PRE7_COMPAT) && defined(COMPAT_FREEBSD32)
struct pci_conf_io32 *cio32;
#endif
switch (cmd) {
case PCIOCGETCONF:
#ifdef PRE7_COMPAT
case PCIOCGETCONF_OLD:
#endif
d_cio = (struct pci_conf_io *)data;
d_cio->status = cio->status;
d_cio->generation = cio->generation;
d_cio->offset = cio->offset;
d_cio->num_matches = cio->num_matches;
return;
#if defined(PRE7_COMPAT) && defined(COMPAT_FREEBSD32)
case PCIOCGETCONF_OLD32:
cio32 = (struct pci_conf_io32 *)data;
cio32->status = cio->status;
cio32->generation = cio->generation;
cio32->offset = cio->offset;
cio32->num_matches = cio->num_matches;
return;
#endif
default:
/* programmer error */
return;
}
}
static void
pci_conf_for_copyout(const struct pci_conf *pcp, union pci_conf_union *pcup,
u_long cmd)
{
memset(pcup, 0, sizeof(*pcup));
switch (cmd) {
case PCIOCGETCONF:
pcup->pc = *pcp;
return;
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
pcup->pco32.pc_sel.pc_bus = pcp->pc_sel.pc_bus;
pcup->pco32.pc_sel.pc_dev = pcp->pc_sel.pc_dev;
pcup->pco32.pc_sel.pc_func = pcp->pc_sel.pc_func;
pcup->pco32.pc_hdr = pcp->pc_hdr;
pcup->pco32.pc_subvendor = pcp->pc_subvendor;
pcup->pco32.pc_subdevice = pcp->pc_subdevice;
pcup->pco32.pc_vendor = pcp->pc_vendor;
pcup->pco32.pc_device = pcp->pc_device;
pcup->pco32.pc_class = pcp->pc_class;
pcup->pco32.pc_subclass = pcp->pc_subclass;
pcup->pco32.pc_progif = pcp->pc_progif;
pcup->pco32.pc_revid = pcp->pc_revid;
strlcpy(pcup->pco32.pd_name, pcp->pd_name,
sizeof(pcup->pco32.pd_name));
pcup->pco32.pd_unit = (uint32_t)pcp->pd_unit;
return;
#endif /* COMPAT_FREEBSD32 */
case PCIOCGETCONF_OLD:
pcup->pco.pc_sel.pc_bus = pcp->pc_sel.pc_bus;
pcup->pco.pc_sel.pc_dev = pcp->pc_sel.pc_dev;
pcup->pco.pc_sel.pc_func = pcp->pc_sel.pc_func;
pcup->pco.pc_hdr = pcp->pc_hdr;
pcup->pco.pc_subvendor = pcp->pc_subvendor;
pcup->pco.pc_subdevice = pcp->pc_subdevice;
pcup->pco.pc_vendor = pcp->pc_vendor;
pcup->pco.pc_device = pcp->pc_device;
pcup->pco.pc_class = pcp->pc_class;
pcup->pco.pc_subclass = pcp->pc_subclass;
pcup->pco.pc_progif = pcp->pc_progif;
pcup->pco.pc_revid = pcp->pc_revid;
strlcpy(pcup->pco.pd_name, pcp->pd_name,
sizeof(pcup->pco.pd_name));
pcup->pco.pd_unit = pcp->pd_unit;
return;
#endif /* PRE7_COMPAT */
default:
/* programmer error */
return;
}
}
static int
pci_bar_mmap(device_t pcidev, struct pci_bar_mmap *pbm)
{
vm_map_t map;
vm_object_t obj;
struct thread *td;
struct sglist *sg;
struct pci_map *pm;
vm_paddr_t pbase;
vm_size_t plen;
vm_offset_t addr;
vm_prot_t prot;
int error, flags;
td = curthread;
map = &td->td_proc->p_vmspace->vm_map;
if ((pbm->pbm_flags & ~(PCIIO_BAR_MMAP_FIXED | PCIIO_BAR_MMAP_EXCL |
PCIIO_BAR_MMAP_RW | PCIIO_BAR_MMAP_ACTIVATE)) != 0 ||
pbm->pbm_memattr != (vm_memattr_t)pbm->pbm_memattr ||
!pmap_is_valid_memattr(map->pmap, pbm->pbm_memattr))
return (EINVAL);
/* Fetch the BAR physical base and length. */
pm = pci_find_bar(pcidev, pbm->pbm_reg);
if (pm == NULL)
return (EINVAL);
if (!pci_bar_enabled(pcidev, pm))
return (EBUSY); /* XXXKIB enable if _ACTIVATE */
if (!PCI_BAR_MEM(pm->pm_value))
return (EIO);
pbase = trunc_page(pm->pm_value);
plen = round_page(pm->pm_value + ((pci_addr_t)1 << pm->pm_size)) -
pbase;
prot = VM_PROT_READ | (((pbm->pbm_flags & PCIIO_BAR_MMAP_RW) != 0) ?
VM_PROT_WRITE : 0);
/* Create vm structures and mmap. */
sg = sglist_alloc(1, M_WAITOK);
error = sglist_append_phys(sg, pbase, plen);
if (error != 0)
goto out;
obj = vm_pager_allocate(OBJT_SG, sg, plen, prot, 0, td->td_ucred);
if (obj == NULL) {
error = EIO;
goto out;
}
obj->memattr = pbm->pbm_memattr;
flags = MAP_SHARED;
addr = 0;
if ((pbm->pbm_flags & PCIIO_BAR_MMAP_FIXED) != 0) {
addr = (uintptr_t)pbm->pbm_map_base;
flags |= MAP_FIXED;
}
if ((pbm->pbm_flags & PCIIO_BAR_MMAP_EXCL) != 0)
flags |= MAP_CHECK_EXCL;
error = vm_mmap_object(map, &addr, plen, prot, prot, flags, obj, 0,
FALSE, td);
if (error != 0) {
vm_object_deallocate(obj);
goto out;
}
pbm->pbm_map_base = (void *)addr;
pbm->pbm_map_length = plen;
pbm->pbm_bar_off = pm->pm_value - pbase;
pbm->pbm_bar_length = (pci_addr_t)1 << pm->pm_size;
out:
sglist_free(sg);
return (error);
}
static int
pci_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
device_t pcidev;
const char *name;
struct devlist *devlist_head;
struct pci_conf_io *cio = NULL;
struct pci_devinfo *dinfo;
struct pci_io *io;
struct pci_bar_io *bio;
struct pci_list_vpd_io *lvio;
struct pci_match_conf *pattern_buf;
struct pci_map *pm;
struct pci_bar_mmap *pbm;
size_t confsz, iolen;
int error, ionum, i, num_patterns;
union pci_conf_union pcu;
#ifdef PRE7_COMPAT
struct pci_io iodata;
struct pci_io_old *io_old;
io_old = NULL;
#endif
if (!(flag & FWRITE)) {
switch (cmd) {
case PCIOCGETCONF:
#ifdef PRE7_COMPAT
case PCIOCGETCONF_OLD:
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
#endif
#endif
case PCIOCGETBAR:
case PCIOCLISTVPD:
break;
default:
return (EPERM);
}
}
switch (cmd) {
case PCIOCGETCONF:
#ifdef PRE7_COMPAT
case PCIOCGETCONF_OLD:
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
#endif
#endif
cio = malloc(sizeof(struct pci_conf_io), M_TEMP,
M_WAITOK | M_ZERO);
pci_conf_io_init(cio, data, cmd);
pattern_buf = NULL;
num_patterns = 0;
dinfo = NULL;
cio->num_matches = 0;
/*
* If the user specified an offset into the device list,
* but the list has changed since they last called this
* ioctl, tell them that the list has changed. They will
* have to get the list from the beginning.
*/
if ((cio->offset != 0)
&& (cio->generation != pci_generation)){
cio->status = PCI_GETCONF_LIST_CHANGED;
error = 0;
goto getconfexit;
}
/*
* Check to see whether the user has asked for an offset
* past the end of our list.
*/
if (cio->offset >= pci_numdevs) {
cio->status = PCI_GETCONF_LAST_DEVICE;
error = 0;
goto getconfexit;
}
/* get the head of the device queue */
devlist_head = &pci_devq;
/*
* Determine how much room we have for pci_conf structures.
* Round the user's buffer size down to the nearest
* multiple of sizeof(struct pci_conf) in case the user
* didn't specify a multiple of that size.
*/
confsz = pci_conf_size(cmd);
iolen = min(cio->match_buf_len - (cio->match_buf_len % confsz),
pci_numdevs * confsz);
/*
* Since we know that iolen is a multiple of the size of
* the pciconf union, it's okay to do this.
*/
ionum = iolen / confsz;
/*
* If this test is true, the user wants the pci_conf
* structures returned to match the supplied entries.
*/
if ((cio->num_patterns > 0) && (cio->num_patterns < pci_numdevs)
&& (cio->pat_buf_len > 0)) {
/*
* pat_buf_len needs to be:
* num_patterns * sizeof(struct pci_match_conf)
* While it is certainly possible the user just
* allocated a large buffer, but set the number of
* matches correctly, it is far more likely that
* their kernel doesn't match the userland utility
* they're using. It's also possible that the user
* forgot to initialize some variables. Yes, this
* may be overly picky, but I hazard to guess that
* it's far more likely to just catch folks that
* updated their kernel but not their userland.
*/
if (cio->num_patterns * pci_match_conf_size(cmd) !=
cio->pat_buf_len) {
/* The user made a mistake, return an error. */
cio->status = PCI_GETCONF_ERROR;
error = EINVAL;
goto getconfexit;
}
/*
* Allocate a buffer to hold the patterns.
*/
pattern_buf = malloc(cio->pat_buf_len, M_TEMP,
M_WAITOK);
error = copyin(cio->patterns, pattern_buf,
cio->pat_buf_len);
if (error != 0) {
error = EINVAL;
goto getconfexit;
}
num_patterns = cio->num_patterns;
} else if ((cio->num_patterns > 0)
|| (cio->pat_buf_len > 0)) {
/*
* The user made a mistake, spit out an error.
*/
cio->status = PCI_GETCONF_ERROR;
error = EINVAL;
goto getconfexit;
}
/*
* Go through the list of devices and copy out the devices
* that match the user's criteria.
*/
for (cio->num_matches = 0, i = 0,
dinfo = STAILQ_FIRST(devlist_head);
dinfo != NULL;
dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
if (i < cio->offset)
continue;
/* Populate pd_name and pd_unit */
name = NULL;
if (dinfo->cfg.dev)
name = device_get_name(dinfo->cfg.dev);
if (name) {
strncpy(dinfo->conf.pd_name, name,
sizeof(dinfo->conf.pd_name));
dinfo->conf.pd_name[PCI_MAXNAMELEN] = 0;
dinfo->conf.pd_unit =
device_get_unit(dinfo->cfg.dev);
} else {
dinfo->conf.pd_name[0] = '\0';
dinfo->conf.pd_unit = 0;
}
if (pattern_buf == NULL ||
pci_conf_match(cmd, pattern_buf, num_patterns,
&dinfo->conf) == 0) {
/*
* If we've filled up the user's buffer,
* break out at this point. Since we've
* got a match here, we'll pick right back
* up at the matching entry. We can also
* tell the user that there are more matches
* left.
*/
if (cio->num_matches >= ionum) {
error = 0;
break;
}
pci_conf_for_copyout(&dinfo->conf, &pcu, cmd);
error = copyout(&pcu,
(caddr_t)cio->matches +
confsz * cio->num_matches, confsz);
if (error)
break;
cio->num_matches++;
}
}
/*
* Set the pointer into the list, so if the user is getting
* n records at a time, where n < pci_numdevs,
*/
cio->offset = i;
/*
* Set the generation, the user will need this if they make
* another ioctl call with offset != 0.
*/
cio->generation = pci_generation;
/*
* If this is the last device, inform the user so he won't
* bother asking for more devices. If dinfo isn't NULL, we
* know that there are more matches in the list because of
* the way the traversal is done.
*/
if (dinfo == NULL)
cio->status = PCI_GETCONF_LAST_DEVICE;
else
cio->status = PCI_GETCONF_MORE_DEVS;
getconfexit:
pci_conf_io_update_data(cio, data, cmd);
free(cio, M_TEMP);
free(pattern_buf, M_TEMP);
break;
#ifdef PRE7_COMPAT
case PCIOCREAD_OLD:
case PCIOCWRITE_OLD:
io_old = (struct pci_io_old *)data;
iodata.pi_sel.pc_domain = 0;
iodata.pi_sel.pc_bus = io_old->pi_sel.pc_bus;
iodata.pi_sel.pc_dev = io_old->pi_sel.pc_dev;
iodata.pi_sel.pc_func = io_old->pi_sel.pc_func;
iodata.pi_reg = io_old->pi_reg;
iodata.pi_width = io_old->pi_width;
iodata.pi_data = io_old->pi_data;
data = (caddr_t)&iodata;
/* FALLTHROUGH */
#endif
case PCIOCREAD:
case PCIOCWRITE:
io = (struct pci_io *)data;
switch(io->pi_width) {
case 4:
case 2:
case 1:
/* Make sure register is not negative and aligned. */
if (io->pi_reg < 0 ||
io->pi_reg & (io->pi_width - 1)) {
error = EINVAL;
break;
}
/*
* Assume that the user-level bus number is
* in fact the physical PCI bus number.
* Look up the grandparent, i.e. the bridge device,
* so that we can issue configuration space cycles.
*/
pcidev = pci_find_dbsf(io->pi_sel.pc_domain,
io->pi_sel.pc_bus, io->pi_sel.pc_dev,
io->pi_sel.pc_func);
if (pcidev) {
#ifdef PRE7_COMPAT
if (cmd == PCIOCWRITE || cmd == PCIOCWRITE_OLD)
#else
if (cmd == PCIOCWRITE)
#endif
pci_write_config(pcidev,
io->pi_reg,
io->pi_data,
io->pi_width);
#ifdef PRE7_COMPAT
else if (cmd == PCIOCREAD_OLD)
io_old->pi_data =
pci_read_config(pcidev,
io->pi_reg,
io->pi_width);
#endif
else
io->pi_data =
pci_read_config(pcidev,
io->pi_reg,
io->pi_width);
error = 0;
} else {
#ifdef COMPAT_FREEBSD4
if (cmd == PCIOCREAD_OLD) {
io_old->pi_data = -1;
error = 0;
} else
#endif
error = ENODEV;
}
break;
default:
error = EINVAL;
break;
}
break;
case PCIOCGETBAR:
bio = (struct pci_bar_io *)data;
/*
* Assume that the user-level bus number is
* in fact the physical PCI bus number.
*/
pcidev = pci_find_dbsf(bio->pbi_sel.pc_domain,
bio->pbi_sel.pc_bus, bio->pbi_sel.pc_dev,
bio->pbi_sel.pc_func);
if (pcidev == NULL) {
error = ENODEV;
break;
}
pm = pci_find_bar(pcidev, bio->pbi_reg);
if (pm == NULL) {
error = EINVAL;
break;
}
bio->pbi_base = pm->pm_value;
bio->pbi_length = (pci_addr_t)1 << pm->pm_size;
bio->pbi_enabled = pci_bar_enabled(pcidev, pm);
error = 0;
break;
case PCIOCATTACHED:
error = 0;
io = (struct pci_io *)data;
pcidev = pci_find_dbsf(io->pi_sel.pc_domain, io->pi_sel.pc_bus,
io->pi_sel.pc_dev, io->pi_sel.pc_func);
if (pcidev != NULL)
io->pi_data = device_is_attached(pcidev);
else
error = ENODEV;
break;
case PCIOCLISTVPD:
lvio = (struct pci_list_vpd_io *)data;
/*
* Assume that the user-level bus number is
* in fact the physical PCI bus number.
*/
pcidev = pci_find_dbsf(lvio->plvi_sel.pc_domain,
lvio->plvi_sel.pc_bus, lvio->plvi_sel.pc_dev,
lvio->plvi_sel.pc_func);
if (pcidev == NULL) {
error = ENODEV;
break;
}
error = pci_list_vpd(pcidev, lvio);
break;
case PCIOCBARMMAP:
pbm = (struct pci_bar_mmap *)data;
if ((flag & FWRITE) == 0 &&
(pbm->pbm_flags & PCIIO_BAR_MMAP_RW) != 0)
return (EPERM);
pcidev = pci_find_dbsf(pbm->pbm_sel.pc_domain,
pbm->pbm_sel.pc_bus, pbm->pbm_sel.pc_dev,
pbm->pbm_sel.pc_func);
error = pcidev == NULL ? ENODEV : pci_bar_mmap(pcidev, pbm);
break;
default:
error = ENOTTY;
break;
}
return (error);
}
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